Measurement report: Changes in light absorption and molecular composition ofwater-soluble humic-like substances during a winter haze bloom-decay processin Guangzhou, China
文献类型：期刊论文
| 作者 | Zou, Chunlin1,2,4; Cao, Tao1,2,4; Li, Meiju1,2,4; Song, Jianzhong1,2,3,5 ; Jiang, Bin1,2,3; Jia, Wanglu1,2,3; Li, Jun1,2,3; Ding, Xiang1,2,3; Yu, Zhiqiang1,2,3,5; Zhang, Gan1,2,3
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| 刊名 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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| 出版日期 | 2023-01-20 |
| 卷号 | 23期号:2页码:963-979 |
| ISSN号 | 1680-7316 |
| DOI | 10.5194/acp-23-963-2023 |
| 英文摘要 | Water-soluble humic-like substances (HULIS) absorb light in near-UV and visible wavelengths and exert significant influence on the atmospheric environment and climate. However, knowledge on HULIS evolution during haze bloom-decay process is limited. Herein, PM2.5 samples were obtained during a winter haze event in Guangzhou, China, and the light absorption and molecular composition of HULIS were investigated by UV-Vis spectrophotometry and ultrahigh-resolution mass spectrometry. Compared with HULIS on clean days, the absorption coefficients (Abs(365)) of HULIS on haze days were significantly higher but the mass absorption efficiencies (MAE(365)) were relatively low, suggesting diverse and dynamic absorption properties of HULIS during haze episodes. The CHO and CHON compounds were the most abundant components in HULIS, followed by CHOS, CHONS, and CHN. Haze HULIS presented comparatively high molecular weight; a lower aromaticity index (AI(mod)); and higher O/C-w, O/N-w, and O/S-w ratios, indicating that HULIS fractions undergo relatively high oxidation during haze days compared to clean days. Moreover, CHON and CHO compounds with high AImod were the major potential chromophores in HULIS and significantly contributed to HULIS light absorption. It is worth noting that the proportions of these chromophores decreased during haze events, mainly owing to their higher oxidation during haze episodes. Besides, accumulated contribution of organic compounds emitted from vehicles and formed from reactions of biogenic volatile organic compounds (bio-VOCs) also diluted light-absorbing compounds in haze HULIS. These findings help us to understand HULIS evolution during haze bloom-decay processes in the subtropic region of China. |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000918797700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/72477]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Song, Jianzhong |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resource, Guangzhou 510640, Peoples R China 3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Guangdong Hong Kong Macao Joint Lab Environm Pollu, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zou, Chunlin,Cao, Tao,Li, Meiju,et al. Measurement report: Changes in light absorption and molecular composition ofwater-soluble humic-like substances during a winter haze bloom-decay processin Guangzhou, China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2023,23(2):963-979. |
| APA | Zou, Chunlin.,Cao, Tao.,Li, Meiju.,Song, Jianzhong.,Jiang, Bin.,...&Peng, Ping'an.(2023).Measurement report: Changes in light absorption and molecular composition ofwater-soluble humic-like substances during a winter haze bloom-decay processin Guangzhou, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(2),963-979. |
| MLA | Zou, Chunlin,et al."Measurement report: Changes in light absorption and molecular composition ofwater-soluble humic-like substances during a winter haze bloom-decay processin Guangzhou, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.2(2023):963-979. |
入库方式： OAI收割
来源：广州地球化学研究所
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